pulseaudio-system.conf

<?xml version="1.0"?><!--*-nxml-*-->
<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">

<!--
This file is part of PulseAudio.

PulseAudio is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.

PulseAudio is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
-->

<busconfig>

  <!-- System-wide PulseAudio runs as 'pulse' user. This fragment is
       not necessary for user PulseAudio instances. -->

  <policy user="pulse">
    <allow own="org.pulseaudio.Server"/>
    <allow send_destination="org.pulseaudio.Server"/>
    <allow receive_sender="org.pulseaudio.Server"/>
  </policy>

</busconfig>